Here's my situation. On a Daily basis I'm constantly switching from Trumpet to Euphonium (I play trumpet for 1 & 2 jazz bands at my school, then Euhponium for Concert Band and Baritone for Marching Band) and as you well know that creates embrochure issues. As of now I have no choice of not playing trumpet but my original plan was to drop trumpet when I get to college and focus strictly on Euphonium. But then while asking for advice on another forum somebody brought this to my attention:
http://www.chasonsmusic.com/hybridcomouthpiecepage.cfm

It's essentially a trombone cup with a trumpet backbore for trombone/baritone/euphonium players who wish to double on higher brass instruments. This seems perfect for my case as I feel that I am stronger on Euphonium than Trumpet but the price is what hurts me. So does anyone know a company or brand that sells the same type mouthpiece or mouthpiece system at a lower price?

Also: My normal set-up is Vincent Bach 3C for Trumpet and Denis Steven Mead Ultra SM3U for Euphonium/Baritone